Explore Scala, a high-level, statically typed language combining functional and object-oriented programming. Gain insights into building scalable apps used by giants like Twitter and LinkedIn.

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Learn how to program in Scala, one of the most popular programming languages in the world right now -- not just amongst developers, but even amongst massive companies like Twitter and LinkedIn.

Scala provides you the tools to build scalable programs easily and effectively. It's a statically typed, high-level language that combines functional programming and object-oriented programming into one flexible package. 

This course will help you stay ahead of the curve, make awesome, scalable apps, and learn a highly coveted new programming language. Start learning today.

Learn Scala from Scratch

Control structures are used for determining the output of a statement

Control structures dictate the flow in which statements are executed

Control structures are diagrams used for understanding the flow of execution

What are control structures used for?

Imperative programming is how to execute a sequence of code and declarative programming is what a sequence of code should do.

Declarative programming is how to execute a sequence of code and imperative programming is what a sequence of code should do.

Functional programming is a subset of imperative programming.

Functional programming is a subset of declarative programming

Which statements regarding imperative and declarative programming are true?
(Multiple correct answers)

Which statements regarding imperative and declarative programming are true?
(Multiple correct answers)

Meet me at the movies at 8pm with Sarah and Ben

Go to my room and open the closet; you will find the sweater on the right end.

Which statement is depictive of imperative programming?

Which statement is depictive of imperative programming?

How many control structures does Scala provide?

How many control structures does Scala provide?

In Scala, control structures return values just like functions.

In Scala, control structures are functions themselves.

In Scala, control structures take arguments like functions.

How does Scala bring a functional approach to imperative control structures?

How does Scala bring a functional approach to imperative control structures?

What will be the output of the following code:

```
val array = Array(1,2,3,4,5)

for (i <- 0 until array.length) {
 if (array(i) % 2 == 0) {
 println(array(i))
 }
}
```

What will be the output of the following code:
<pre><code>val array = Array(1,2,3,4,5)

for (i &lt;- 0 until array.length) {
 if (array(i) % 2 == 0) {
 println(array(i))
 }
}
</code></pre>

What will be the output of the following code:

```
val constantPattern: Any = List()

constantPattern match {
  case 5 => print("five")
  case true => print("truth")
  case "hello" => print("hi!")
  case Nil => print("the empty list")
  case _ => print("something else")
} 
```

What will be the output of the following code:
<pre><code>val constantPattern: Any = List()

constantPattern match {
 case 5 =&gt; print(&quot;five&quot;)
 case true =&gt; print(&quot;truth&quot;)
 case &quot;hello&quot; =&gt; print(&quot;hi!&quot;)
 case Nil =&gt; print(&quot;the empty list&quot;)
 case _ =&gt; print(&quot;something else&quot;)
} 
</code></pre>

What will be the output of the following code:

```
val sequencePattern = Array(1,2,0)

sequencePattern match {
  case Array(0,_,_)  => println("case1")
  case Array(1,_,_)  => println("case2")
  case Array(_,_,0)  => println("case3")
  case _ => println("default")
}
```

What will be the output of the following code:
<pre><code>val sequencePattern = Array(1,2,0)

sequencePattern match {
 case Array(0,_,_) =&gt; println(&quot;case1&quot;)
 case Array(1,_,_) =&gt; println(&quot;case2&quot;)
 case Array(_,_,0) =&gt; println(&quot;case3&quot;)
 case _ =&gt; println(&quot;default&quot;)
}
</code></pre>

<code>while</code> is an expression.

Unlike the other control structures, it is not an expression.

Unlike the other control structures, it doesn't have a return value.

In Scala, the other control structures are preferred over `while`.

How is `while` different from the other control structures?

How is <code>while</code> different from the other control structures?

In the next chapter, we will jump to functions and start seeing Scala's actual power.

In the following quiz, you will be tested on concepts you learned in this chapter.

Getting to Know Scala

Variables and Types

Operating with Operators

Strings and How to Use Them

Scala's Collection Library

Control Structures

Getting Started with Functions

Higher-Order Functions

Classes and Objects

Conclusion

Chapter Quiz